If bread is the staple of human life, calcium is its backbone Lacking calcium, the bones of every living creature, from people to flounders, wouldn’t exist Without calcium neither clams nor bird eggs would have shells Chickens, and especially laying hens, need plenty of it to maintain both their health and laying ability

Laying hens have a calcium dilemma When chickens were wild birds roaming the Southeast Asian woodlands, they would only lay one or two clutches of eggs a year, maybe two dozen total Every egg removes calcium from the hen’s body, but when she didn’t lay many eggs,